Examine the institutional mechanisms available in India to balance cultural/religious practices with environmental protection, citing the role of CPCB and NGT.

Article 25 guarantees freedom of religion, but subject to public health; Articles 48A and 51A(g) simultaneously cast a duty to protect the environment. Idol immersion during festivals such as Ganesh Chaturthi is where this tension is negotiated — not by prohibition, but through a layered regulatory, judicial and field-level architecture.

Regulatory-technical arm: CPCB and SPCBs

• Statutory base: CPCB and State Boards are created under the Water (Prevention and Control of Pollution) Act, 1974, mandated to restore the "wholesomeness" of streams [3].
• CPCB finalised "Guidelines for Idol Immersion" (2010), revised in 2020 — banning Plaster of Paris idols, mandating natural colours, curbing single-use plastic decoration, restricting idol size, and promoting temporary synthetic-lined ponds as substitutes for rivers [1][2].
• Evidence-based regulation: CPCB runs the National Water Quality Monitoring Programme [3] and compiles pre- and post-immersion water quality assessments across States, converting festival pollution from anecdote into data [4].

Judicial-adjudicatory arm: NGT

• The NGT Act, 2010 created a specialised, multi-disciplinary tribunal with five benches, not bound by civil procedure and mandated to decide within six months [5].
• It has issued directions on immersion pollution, including its order of 21.09.2020, compelling compliance where State enforcement lapsed [6] — illustrating judicial correction within environmental federalism.

Executive-local arm

• Immersion requires prior permission of the District Administration, confined to designated days and sites [2] — as at the designated stretch downstream of Prakasam Barrage on the Krishna, Vijayawada, where mechanical cranes and trained swimmers combined ecological containment with public safety [7].

The mechanisms are therefore complementary: CPCB supplies standards and data, NGT supplies enforcement pressure, districts supply execution. Weakness lies not in design but in seasonal monitoring capacity and uneven municipal compliance. Strengthening artisan-level incentives for clay idols, ward-level artificial ponds, and community participation — as under sustainable-consumption goals of SDG 12 — can make faith and ecology mutually reinforcing rather than competing claims.